Warning! Mount Semeru Erupts Again Tonight (Sunday, July 27, 2025)

Mount Semeru in East Java erupted again on Sunday (7/27/2025) at 11:20 PM WIB. In the last week, Mount Semeru has erupted 28 times.

Citing eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the height of the ash column was observed to be around None meters above the peak or None meters above sea level.

The visual eruption was not observed. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 135 seconds.

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According to MAGMA Indonesia's volcano activity report, Mount Semeru's activity level is at Level II (Alert). Seismic observations on July 27, 2025, at 00:00-23:59 WIB showed 58 eruption/explosion earthquakes with amplitudes of 10-22 millimeters and durations of 67-255 seconds.

Furthermore, there were 3 rockfall earthquakes with amplitudes of 3-15 mm and durations of 45-130 seconds, and 6 emission earthquakes with amplitudes of 2-8 millimeters and durations of 46-85 seconds.

PVMBG urges against any activity in the southeast sector along Besuk Kobokan, as far as 8 kilometers from the peak (eruption center). Beyond that distance, the public is advised not to carry out activities within 500 meters from the riverbanks (river borders) along Besuk Kobokan as there is a potential for hot clouds and lava flows to extend up to 13 kilometers from the peak.

Throughout 2025, MAGMA Indonesia has recorded 5,343 volcanic eruptions across Indonesia. Mount Semeru in East Java has erupted the most with 2,145 occurrences.

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